RGD uses the Human Disease Ontology (DO, https://disease-ontology.org/) for disease curation across species. RGD automatically downloads each new release of the ontology on a monthly basis. Some additional terms which are required for RGD's curation purposes but are not currently covered in the official version of DO have been added. As corresponding terms are added to DO, these custom terms are retired and the DO terms substituted in existing annotations and subsequently used for curation.
A scleral disease that is characterized by a painless severe necrotizing scleritis where the sclera is white, avascular, and thin. The choroid can become exposed leading to infarction and necrosis of related areas; the sclera can also thin such that the dark uvea protrudes through the front of the eye, forming a staphyloma which has_symptom loss of vision and appearance of a dark bulge. Scleromalacia perforans is usually caused by a rare complication of autoimmune disease like rheumatoid arthritis. (DO)